<!DOCTYPE html>
<html lang="zh_CN">
<head>
<meta charset="utf-8" />
<title></title>
<link rel="stylesheet" type="text/css" href="css/bootstrap.css">
<script>
	
</script>
</head>

<body>
	<div class="btn-group">
		<button class="btn">1</button>
		<button class="btn">2</button>
		<button class="btn">3</button>
	</div>
</body>
</html>